steel prop. comparision

Blop

Blop

Joined
Mar 7, 2003
Messages
1,321
Hello to all forumites,

I´m new here and it´s my first question on to a forum.

So, the question:

In a comparision, wich of these steel grades is the toughest (blade shape all the same): 154CM, M2, S30V, 440C, 440A, D2, 420V?

I mean the toughest not at the same HRC-grade, every steel at his own specific best HRC, f.e. 154CM at about 58-60HRC, M2 at about 62-65HRC, D2 at 59-61HRC, the way they are sold out usually.
 
440A has a high impact toughness and ductility for a stainless. D2, S30V, 440C, and 154-CM are all significantly more brittle than 440A [in that order], and are of similar toughness to each other, I would not get excited about the differences [the exact hardness is fairly critical here, most people run 440C at similar hardness levels but S30V is being ran from the mid fifties to the low sixties and that will span a rather large range of properties]. 420V is significantly more brittle as is M2 at that hardness. M2 is also ran at quite a range of hardness levels, from the high fifties to the high sixties and these have very different behaviors.

-Cliff
 
Thanks to you both,

at least, i expected them to be fairly similar in toughness. Thanks for the statements.
 
do you think that the German equivalent DIN 1.4110 displayes the same properties as the 440A?
 
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